[BitWielder1]

Allow me to paraphrase:
"You think you're so smart that the first thing that flies into your head is the final answer to any problem."
I've met people like that. In defense of MENSA I must say most of them would probably not qualify.
How easy things would be if Smart equaled Right.
I suspect it might be related to the Hollywood Syndrome where they believe Famous equals Important.

[Erasmus]

One of the liabilites of raw mental power is the likelihood of its effective use in the process of self-deception.

And when a clever, bright, well-spoken, charismatic person with sufficiently poor opinion of self and of humanity has succeeded in fooling himself, he’s well on the way to fooling millions; with the customary dire result for mankind.